* Enabled unified_mode for all resources
* Add notes to CHANGELOG
* Move the apache2 service to earlier on in the run
This puts it in the resource collection for everyone else to hook off
earlier
* Make the config resource notify the services resource with `:enable`
This makes sure that the apache2 service is enabled on all platforms
[Release: Major]

* Rename libexec_dir to apache_libexec_dir
This works around an issue when using this cookbook with the docker cookbook at
the same time. They both have a function called ``libexec_dir`` and docker seems
to override this cookbook. To work around this, renaming our function to
``apache_libexec_dir`` seems to work.
This resolves #677.
* Disable MD024 because we follow Keep A Changelog syntax which conflicts